report earlier, they are literally going to piece by piece put this together, as much as possible with technology and the cameras that were all around that scene. >> i think one of the authorities this morning described this as probably one of the most heavily photographed areas in the country yesterday. just because of this event going on. and they hope with so many lenses pointed and so many different directions, somebody somewhere got something that will be of investigative value. so what they'll try to do with the videos, to the extent that they can, match them up in terms of time. so that they are all registered. so the frame, as you go frame by frame, you're moving in the same time dimension. you're going a second ahead in each one at the same time of day. and then they'll try to look at still photos and try to line those up as well, hoping they can see something there that maybe people weren't aware of at the time. >> all right. pete williams, thank you very much for the latest information on the investigation. let's to go kris jansing. she is at a crime scene focused on about 12 blocks. w